Thank you for downloading Planet Stacker X

This is an unsigned version of the app. By default, macOS will quarantine
the app and not allow it to run on your computer. To remove the quarantine you will need to open terminal, navigate to the folder where you downloaded the app, and run the following command:

sudo xattr -r -d com.apple.quarantine Planet\ Stacker\ X.app

After that you can copy the app to your Applications folder and run it like normal.